The spirit Knights was a guild created by Orm Macnith around March 3rd, 1999. It has the dubious distinction of having the absolute worst guild webpage I have ever seen which is borderline unviewable. The guild seemed to be designed with the express purpose of challenging the evil in Tibia.
Their backstory is that the guild came from the land of Nexus, Kingdom of the Wind to protect Tibia after their land was already clear of evil. I am not sure why they thought they would be able to clear out Tibia's evil players who were very experienced, but their proclamation on the website led directly to conflict with PoD right away (perhaps the PoD destroyed them to save us from the guild's website?). The guild lasted before the end of the summer before melting away.
Their Codex was:
"1. Uphold the peace.
2. Defend the Poor.
3. Help all in need.
4. Must be a Role Player
5. No Matter what, do not give your key to anyone, there will be a house guard.
6. Help Bring Tibia peace.
7. Guard thy post well
8. You will be given a post, on a street, you will have to guard that street from PKs"